Gearing.



J. W. & H. R. BRCLY.

Gamma.

YPLIULTIOH FILED PEB. 14| 1911, 1,012,1 19. Patented Dea 19, 1911.

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coLuMlsM H ANmnAPM Co.. Wamm. D c4 J. W. 6I H. R. BARCLAY- GBBING. APPLICATION IILBD IBB. 14, 1911. v1,012" 1 19, Ptlltd D60.19,1911.

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coLLIMBlA PLANDGRAVH co.. WASHINGTON. D. :I

BEARING.

APPLIUA'I'IUN EILBD FEB.14, 1911. 1,012,1 1 9. Patented De.19,1911.

3 SHEETS-SHEET 3 UNITED STATES JOHN W. BARCLAY AND HOMEB It'. BARCLAY, 0F COVEI., ILLINOIS.

GEARIN Gr.

Speccation of Letters Patent.

Patented Dec. 19, 1911.

Application led February 14, 1911 Serial No. 608,585.

To all whom it may concern:

Be it known that we, JOHN W. BARCLAY and Homan R. BARCLAY, both citizens of the United States, residing at Covel, in the county of McLean and State of Illinois, have invented certain new and useful Improvements in Gearing, of which the following lis a specification.

This invention relates to a variable speed and reverse gearing for automobiles and other power-driven vehicles, and particularlj7 to transmission gearing of the friction type, the object of the invention being to provide a friction gearing of this character which reduces the amount of slippage and loss of energy common to all ordinary friction gearing when co-acting gear members are thrown into contact, and to provide controlling means whereby the various sets of gears may be easily, readily and positively thrown into and out of contact for the high, medium and low speed and reverse actions.

The invention consists of the features of construction, combination and arrangement of parts hereinafter described and claimed, reference being had to the accompanying drawings, in which:

Figure 1 is a view artly in side elevation and partly in vertical longitudinal section showing the application of the invention to an automobile chassis, the controlling lever being in neutral position. Fig. 2 is a top plan view on an enlarged scale showing the caring and portion of the chassis on whic it is mounted. Fig. 3 is an enlarged vertical transverse section on line-3*?) of Fig. 2, the different positions of the controlling lever being indicated in full and dotted lines. Figs. 4 and 5 are corresponding transverse sections showing the out and in position of the reverse gears. Figs. 6 and 7 are similar views of the low speed gears. Fig. 8 is a View similar to Figs. 4 and 6 of the medium s eed gears, showing the same thrown out ofJ engagement with each other. Fig. 9 is a similar view of the high speed ears. Fig. 10 is a detail front elevation of t e rockshaft and associated parts for setting the actuating or adjusting cam.

In Figs.` 4, 6, 8 and 9 the actuating or adjusting cam is shown in the relative position it assumes when the operating and controlling levers are in normal position.

Referring to the drawings, 1 designates the chassis or frame of an automobileg the driving motor thereof; 3 the crank shaft of the motor, forming the primary drive shaft of the gearing; 4 the fly-Wheel on said shaft; 5 a driven shaft, 6 the rear axle of the vehicle in gear with said driven shaft and receiving motion therefrom, and 7 a pivoted operating lever carrying a locking dog or pawl 8 topengage anyone of a series of notches 9, 10, 11, 12 and 13 in a rack 14 fixed to the frame for securing said lever in its different positions of adjustment.

The rear end of the drive shaft 3 is arranged to overlie the front end of the shaft 5, which ends of said shafts are respectively journaled upon one of a pair of cross bars 15 fixed to the frame and upon brackets 15 carried by said cross bars. Fixed to the shaft 3 are friction rollers or disks 16, 17, 18 and 19, and fixed to the shaft 5 are coperating friction rollers or disks 16, 17, 18a and 19a, the rollers or disks of one set being arranged opposite and spaced from the rollers or disks of the other set, as shown.

The co-acting pairs of rollers or disks 16 and 16a 17 and 17, 18 and 18, respectively constitute high, medium and low speed cou ples,.while the rollers or disks 19 and 19 constitute a reversing couple, the rollers or disks of each couple being of proper relative diameter for the transmission of the desired rate of speed. Arranged for cooperation with the high, medium and low speed couples are transmission rollers or disks 16", 17 b and 18h and arranged for coperation with the reversing couples in a pair of friction rollers or disks 19h and 19V, in contact for the transmission of motion from one to the other, as shown.

Mounted upon the bars 15 in parallel relation to the shafts 3 and. 5 is a control shaft 28 journaled for a lateral rocking or oscillatory motion, and feathered to turn with and slide longitudinally along said shaft is an actuating or adjustin cam 28 preferably of oval or elliptical orm, the point 29 of which cam is adapted to engage the antifriction roller 25 on any of the sliding rods 21 for sel tively adjusting the transmission rollers in o enga ement with the co-acting couple. To the forward end of this shaft 28 is connected a crank arm 30 connected to the frame or chassis by a contractile spring 31 whereb the shaft is normally held to maintain t e point of the cam swun inward ,or in projected position. Attache at one f end to the arm 30 is a rope chain or cable 31 which passes over the guide pulleys 32 and is attached at its opposite end to a treadle or foot lever 33, by the depression of* which the rope or cable will be drawn upon to pull the arm outwardly against the resistance of the spring, whereby the shaft 28 will be rocked to swing the point of the cam outwardly, so that said cam may be shifted on said shaft to engage the anti-friction roller 25 of any of the sliding supports 21. without interference from or contacting with any of the intervening rollers 25. The cam has an annularly grooved collar engaged by the forked end of a shipper arm 34 carried by a shipper rod 35 mounted on the bars 15 to slide parallel with the shaft 2S. The forward end of this rod has a slipjoint connection with a crank arm 36 mounted on a rock shaft 37 to which is attached the operating lever 7 ,'whereby the shipper rod may be moved in either direction to adjust or set the actuating cam.

In practice, the sliding supports are so arranged as to provide a space into which the point of the cam may project when the lever 7 is in neutral or cut-out position without interfering with any of said supports. In adjusting the cam from such position or any other position into engagement with a particular sliding support, the treadle is depressed to swing the cam outwardly, and the operating lever adjusted to the dedised position, whereby the cam will be shifted without interference from any of the rollers 25. When the lever and cam are set and the treadle released the spring will return shaft 28 to normal position, whereby the cam will be projected to slide the support opposite it or in line with which it is disposed inwardly to proect the transmission gear thereof. It will be noted that by 'simply depressing the treadle the cam may be retracted to throw the transmission mechanism out at any operative point, an immediate release being effected, whereby quick control over the gearing is afforded, and that by means of the adjusting mechanism described the gearing may be easily and eX- peditiousl adjusted for low, medium or high Spee or reverse action.

The transmission rollers or disks are journaled upon brackets 20, each mounted upon one end of a rod 21, tted to slide transversel of the frame in guide bars 22 and 23 exten ing between the cross bars, the outer ends of said rods having forks 24 in which are journaled anti-friction roller@r 25. The rods are movable transversely of the frame toward and from the respective gear couples, and each rod is normally held in out of gear or retracted position by a coiled spring 26. This sprin encircles the rod between the inner ide ar 22 and a fixed collar 2T on the ro which collar bears against the' outer cross bar 23 to limit the outward movement of the rod. Furthermore, it will be seen that the adustments of any of the transmission mem ers into or out of operative position will bring it directly between and 1n peripheral contact with the disks of the coacting couple whereby a rapid make and break action is established, preventing the slippage and loss of power, as well as the resultant shocks and strains, incident to many types of friction gearing when the gear elements are thrown into and out of engagement.

We claim:

1. A friction drive gearing comprisin driving and driven shafts, friction dis couples in spaced relation upon said shafts, supports movable in a direction at right angles to said shafts, transmission disks carried by said supports to engage the respective couples and normally maintained out of contact therewith, an operating member slidably adjustable for engagement with any of said supports to selectively adjust the transmission disks into peripheral engagement with the coacting couples, and means for adjusting said member to an operative position and actuating the same to move the correlated support.

2. A friction drive gearing comprisin driving and driven shafts, friction dis couples in spaced relation upon said shafts, slidlng spring retracted supports movable in a direction at right angle to said shafts, transmission disks carried by said supports to engage the respective couples and normally maintained out of contact therewith, and means for actuating said supports to selectively adj ust the transmission disks into peripheral engagement with the coacting couples.

3. A friction drive gearing comprisin driving and driven shafts, friction dis couples in spaced relation upon said shafts, supports movable in a direction at right angles to said shafts, transmission disks carried by said supports to engage the respective couples and normally maintained outf of contact therewith, a cam device adjustable into alinement with an of said supports, means for rocking sai cam for actuating any of said supports to adjust the transmission disks into peripheral enga ement with the coacting couples, means or shifting said device to an inoperative position to adapt the same to clear said supports in its adjustments.

4. A friction drive gearing comprisin driving and driven shafts, friction dis couples in spaced relation upon said shafts, slidin spring-retracted supports movable in a irection at right an les to said shafts, transmission disks carrie by said supports to engage the respective couples and normally maintained out of contact therewith, a control shaft, a cam carried by sai-d shaft to selectively adjust the transmission disks into peripheral contact with the co-acting couples, and means for adjusting said cam.

5. Gearing of the character described comprising a drive shaft, a driven shaft, cooperatln pairs of spaced driving gears on said shafts, transmission gears movable to- Ward and from the respective pairs of driving gears, a device movable to different positions' for selectively adjusting any of said transmission gears into and out of engaging position, and means for adjusting said device.

6. A friction drive gearing comprising driving and driven shafts, friction disk couples in spaced relation upon said shafts, sliding spring retracted supports movable in a direction at right angles to said shafts, transmission disks carried by said supports to peripherally engage the respective couples, an oscillatory control shaft parallel with the first named shafts, an operating lever movable to different operative positions, a cam feathered to slide on and oscillate With said control shaft, means for oscillating the control shaft to throw the point of the cam out of operative position,

and means actuated by the operating lever to shift the cam along said control shaft for actuating said supports to selectively shift said transmission disks into contact with the co-acting couples.

7. Gearing of the character described comprising a drive shaft, a driven shaft, cooperating pairs of spaced drive gears on said shafts, transmission gears movable toward and from the respective pairs of driving gears, automaticall retracted supports therefor, a device mova le to different positions for selective engagement with any of said supports, means for adjusting said device into operative position and operating the same to actuate the correlated support, and means for throwing said device into and out of normal operative position.

-In testimony whereof we aix our signatures in presence of two Witnesses.

JOHN W. BARCLAY. HOMER R. BARCLAY.

VVit-nesses S. S. BARCLAY, C. E. BARCLAY.

Copies of this patent may he obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. G. 

